UC1832

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精确低压降线性控制器

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产品详情

Output options Adjustable Output Iout (max) (A) 0.45 Vin (max) (V) 40 Vin (min) (V) 4.5 Vout (min) (V) 1.98 Fixed output options (V) 2 Noise (µVrms) 0 Iq (typ) (mA) 3.3 Thermal resistance θJA (°C/W) 0 Rating Military Load capacitance (min) (µF) 10 Regulated outputs (#) 1 Features Enable Accuracy (%) 5 PSRR at 100 KHz (dB) 90 Dropout voltage (Vdo) (typ) (mV) 0 Operating temperature range (°C) -55 to 125
Output options Adjustable Output Iout (max) (A) 0.45 Vin (max) (V) 40 Vin (min) (V) 4.5 Vout (min) (V) 1.98 Fixed output options (V) 2 Noise (µVrms) 0 Iq (typ) (mA) 3.3 Thermal resistance θJA (°C/W) 0 Rating Military Load capacitance (min) (µF) 10 Regulated outputs (#) 1 Features Enable Accuracy (%) 5 PSRR at 100 KHz (dB) 90 Dropout voltage (Vdo) (typ) (mV) 0 Operating temperature range (°C) -55 to 125
CDIP (J) 14 130.4652 mm² 19.56 x 6.67 LCCC (FK) 20 79.0321 mm² 8.89 x 8.89
  • Precision 1% Reference
  • Over-Current Sense Threshold Accurate to 5%
  • Programmable Duty-Ratio Over-Current Protection
  • 4.5 V to 36 V Operation
  • 100mA Output Drive, Source, or Sink
  • Under-Voltage Lockout
  • Additional Features of the UC2832 series:
    • Adjustable Current Limit to Current Sense Ratio
    • Separate +VIN terminal
    • Programmable Driver Current Limit
    • Access to VREF and E/A(+)
    • Logic-Level Disable Input

  • Precision 1% Reference
  • Over-Current Sense Threshold Accurate to 5%
  • Programmable Duty-Ratio Over-Current Protection
  • 4.5 V to 36 V Operation
  • 100mA Output Drive, Source, or Sink
  • Under-Voltage Lockout
  • Additional Features of the UC2832 series:
    • Adjustable Current Limit to Current Sense Ratio
    • Separate +VIN terminal
    • Programmable Driver Current Limit
    • Access to VREF and E/A(+)
    • Logic-Level Disable Input

The UC2832 and UC3833 series of precision linear regulators include all the control functions required in the design of very low dropout linear regulators. Additionally, they feature an innovative duty-ratio current limiting technique which provides peak load capability while limiting the average power dissipation of the external pass transistor during fault conditions. When the load current reaches an accurately programmed threshold, a gated-astable timer is enabled, which switches the regulator’s pass device off and on at an externally programmable duty-ratio. During the on-time of the pass element, the output current is limited to a value slightly higher than the trip threshold of the duty-ratio timer. The constant-current-limit is programmable on the UCx832 to allow higher peak current during the on-time of the pass device. With duty-ratio control, high initial load demands and short circuit protection may both be accommodated without extra heat sinking or foldback current limiting. Additionally, if the timer pin is grounded, the duty-ratio timer is disabled, and the IC operates in constant-voltage/constant-current regulating mode.

These IC’'s include a 2 Volt (±1%) reference, error amplifier, UVLO, and a high current driver that has both source and sink outputs, allowing the use of either NPN or PNP external pass transistors. Safe operation is assured by the inclusion of under-voltage lockout (UVLO) and thermal shutdown.

The UC3833 family includes the basic functions of this design in a low-cost, 8-pin mini-dip package, while the UC2832 series provides added versatility with the availability of 14 pins. Packaging options include plastic (N suffix), or ceramic (J suffix). Specified operating temperature ranges are: commercial (0°C to 70°C), order UC3832/3 (N or J); and industrial (–40°C to 85°C), order UC2832/3 (N or J). Surface mount packaging is also available.

The UC2832 and UC3833 series of precision linear regulators include all the control functions required in the design of very low dropout linear regulators. Additionally, they feature an innovative duty-ratio current limiting technique which provides peak load capability while limiting the average power dissipation of the external pass transistor during fault conditions. When the load current reaches an accurately programmed threshold, a gated-astable timer is enabled, which switches the regulator’s pass device off and on at an externally programmable duty-ratio. During the on-time of the pass element, the output current is limited to a value slightly higher than the trip threshold of the duty-ratio timer. The constant-current-limit is programmable on the UCx832 to allow higher peak current during the on-time of the pass device. With duty-ratio control, high initial load demands and short circuit protection may both be accommodated without extra heat sinking or foldback current limiting. Additionally, if the timer pin is grounded, the duty-ratio timer is disabled, and the IC operates in constant-voltage/constant-current regulating mode.

These IC’'s include a 2 Volt (±1%) reference, error amplifier, UVLO, and a high current driver that has both source and sink outputs, allowing the use of either NPN or PNP external pass transistors. Safe operation is assured by the inclusion of under-voltage lockout (UVLO) and thermal shutdown.

The UC3833 family includes the basic functions of this design in a low-cost, 8-pin mini-dip package, while the UC2832 series provides added versatility with the availability of 14 pins. Packaging options include plastic (N suffix), or ceramic (J suffix). Specified operating temperature ranges are: commercial (0°C to 70°C), order UC3832/3 (N or J); and industrial (–40°C to 85°C), order UC2832/3 (N or J). Surface mount packaging is also available.

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技术文档

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类型 标题 下载最新的英语版本 日期
* 数据表 Precision Low Dropout Linear Controllers 数据表 (Rev. A) 2003年 6月 3日
* SMD UC1832 SMD 5962-93265 2016年 6月 21日
应用手册 LDO 噪声揭秘 (Rev. B) PDF | HTML 英语版 (Rev.B) PDF | HTML 2020年 9月 16日
应用手册 LDO PSRR Measurement Simplified (Rev. A) PDF | HTML 2017年 8月 9日
应用手册 简化的 LDO PSRR 测量 最新英语版本 (Rev.A) PDF | HTML 2010年 7月 28日
应用手册 Using the UCx832 Linear Controller With an NMOS Pass Element 2008年 8月 11日
应用手册 DN-32 Optocoupler Feedback Drive Techniques 1999年 9月 5日
应用手册 U-152 A High-Performance Linear Regulator for Low Dropout Applications 1999年 9月 5日

设计和开发

如需其他信息或资源,请点击以下任一标题进入详情页面查看(如有)。

仿真模型

UCx832 PSpice Average Model

SLUM079.ZIP (70 KB) - PSpice Model
仿真模型

UCx832 PSpice Transient Model

SLUM070.ZIP (40 KB) - PSpice Model
仿真模型

UCx832 TINA-TI Average Reference Design

SLUM128.TSC (124 KB) - TINA-TI Reference Design
仿真模型

UCx832 TINA-TI Average Spice Model

SLUM127.ZIP (14 KB) - TINA-TI Spice Model
仿真模型

UCx832 TINA-TI Transient Reference Design

SLUM130.TSC (134 KB) - TINA-TI Reference Design
仿真模型

UCx832 TINA-TI Transient Spice Model

SLUM129.ZIP (20 KB) - TINA-TI Spice Model
封装 引脚 下载
CDIP (J) 14 查看选项
LCCC (FK) 20 查看选项

订购和质量

包含信息:
  • RoHS
  • REACH
  • 器件标识
  • 引脚镀层/焊球材料
  • MSL 等级/回流焊峰值温度
  • MTBF/时基故障估算
  • 材料成分
  • 鉴定摘要
  • 持续可靠性监测
包含信息:
  • 制造厂地点
  • 封装厂地点

支持和培训

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